What do archaeologists identify as one possible reason for the decline of the indus civilization

Some scholars and archaeologists consider a theory related to a sequence of natural and socio-economic factors which determined the decline of the Indus cities.  

They believe that in the Indus Valley region occurred numerous tectonic disturbances which caused earthquakes and changed courses of rivers or dried them up.

These events might have caused a great flood by separating food producing areas from urban centers.

the answer is d. party organizers, volunteers, voters and elected officials.

name two ways organisms join a population and two ways organisms leave a population. two ways organisms join a population are birth rate and immigration. two ways they leave are death rate and emigration.

explanation: